com.googlecode.objectify.impl.translate

Class EmbedMapTranslatorFactory

java.lang.Object

com.googlecode.objectify.impl.translate.EmbedMapTranslatorFactory

All Implemented Interfaces:

TranslatorFactory<Map<Object,Object>>

public class EmbedMapTranslatorFactory
extends Object
implements TranslatorFactory<Map<Object,Object>>

Translator which manages an expando-style Map. The key must be String (or something that converts easily to and from String), which becomes a normal path element in the entity. The value can be anything that goes into a Collection; a basic type, an embedded type, a reference, a null, etc. Pretty much the same attribute rules apply as apply to Collections.

Map keys cannot contain '.' and cannot be null. The types currently allowed are:

• String
• Key (the Objectify type)

At some point this may be expanded to cover any class that has a String constructor, static valueOf(String), or static create(String) method.

However, Maps are not list structures, so you don't have the same restriction on embedding; you can put maps inside of maps and lists inside of maps.

Author:

Jeff Schnitzer

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	EmbedMapTranslatorFactory.MapMapNodeTranslator

Constructor Summary

Constructors

Constructor and Description
EmbedMapTranslatorFactory()

Method Summary

Methods

Modifier and Type	Method and Description
Translator<Map<Object,Object>>	create(Path path, Property property, Type type, CreateContext ctx)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EmbedMapTranslatorFactory

public EmbedMapTranslatorFactory()

Method Detail

create

public Translator<Map<Object,Object>> create(Path path,
                                    Property property,
                                    Type type,
                                    CreateContext ctx)

Specified by:

create in interface TranslatorFactory<Map<Object,Object>>

Parameters:

path - current path to this part of the tree, important for logging and exceptions

property - is the property we are inspecting to create a translator for

type - is the generic type of the field (or field component). For example, examining a field of type List will have a Type of List; the TranslatorFactory which recognizes List may then ask for a translator of its component type String.

Returns:

null if this factory does not know how to deal with that situation.